Syringe



2 Sheets-Sheet 1.l

(No Model.)

e. D.. HARSIN,

SYRINGE.

Patented Feb. 20, 1894 ma mmoNAL umolmumma ceurmv'.

N Model.) 8 sheets-sheen 2.

0.8. HARSIN.- SYRINGE.

No. 515,288. Pateted Feb. 20, 1894.

nein.

Arent CHARLES D. IIARSIN, OF STOCKTON, CALIFORNIA.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 515,288, dated February 20, 1894,

Application led April 24;, 1893' Serial No. 471,723. (No model.)

To all whom t may concern:

le it known that I, CHARLES D. HARsIN, a cltlzen of the United States, and a resident of Stockton, in the county of San Joaquin and serve to expel liquids into the parts to be washed or treated and receive the liquid back into itself alternately by the operations of force and suction. To the accomplishment of these ends, I employ, in the preferred embodiment of my invention, a rigid non-colf lapsible external bulb or receiver provided with an extended nozzle or tube, a central tube fixed to and extended longitudinally through said rigid external bulb and having one end thereof provided with radial discharge openings, and having at an intermediate point of its length one or more radial openings, an expansible and collapsible bulb contained Within the external rigid bulb or receiver, to be limited to its outward displacement or distension thereby, and attached to the longitudinal tube on opposite sides of the radial openings therein, and a hollow valve-rod which is fitted within'said fixed tube and it carries a sliding valve and is provided With radial openings adapted to align with similar openings in the xed tube. These devices are all carried or sustained by the external rigid bulb, and the device may form an attachment to any ordinary syringe or it may be made and sold as an integral part of the syringe. To one end of the hol-- low valve rod is connected the delivery end of the syringe-hose, and by adjusting the valve rod in the tube so its openings coincide with those in the tube, the liquid can be forced through the valve rod into the expansible and collapsible internal bulb until the latter is lled, the displacement of the internal bulb being limited by contact with the 5o external rigid bulb or receiver.

I will now proceed to a detailed description of the preferred embodiment of my invention, reference being had to the accompanying drawings, forming a part of this specification, and in which- Figure l is a longitudinal sectional view through my improvement. Fig. 2 is a detached sectional view of the stationary longitudinal tube. Fig. 3 is a similar view of the hollow valve rod and the sliding valve. Fig. 4. is an end view looking at the discharge end of the bulb. Fig. 5 is a view of the complete syringe. f

Like letters of reference denote corresponding parts in all the iigures of the drawings.

A is the external bulb or receiver which is madeof a suitable unyielding material, preferably hard rubber, although any other suitable material may be used. This bulb may be made in a single piece as shown in Fig. l, or of a series of sections suitably connected together by tight joints. At one end, this hard rubber bulbA is extended or projected in the form of a nozzle or tube a, and at its other end the bulb is formed with an opening o', which is interiorly screw-threaded. This nozzle or tube a of the bulb or receiver Ahas an inwardly projecting flange h, in which is formed a series of openings h', for a purpose to be explained.

B is the stationary tube which extends through'the bulb A and its nozzle in the line of their major axes, that is, longitudinally through said bulb and nozzle. At one end, this tube Bis enlarged in the form of a anged threaded collar b which is screwed into the threaded opening ce of the bulb A to form a tight joint between said tube and bulb; and the other end of this tube B is fixed in the flange 7?, of the nozzle a in any suitable Way to make the necessary tight joint. This end of the internal longitudinal tube B is providedwith the perforated head y which lies substantially iush with the angc h of the nozzle, and through this perforated heady the liquid is adapted to be forced, under pressure, in the form of a spray. This internal longitudinal tube B is provided at an intermediate point of its length With one or more radial openings 0o, and with longitudinal guideslots or grooves r.

C is the hollow valve rod constructed to iit Iko O snugly-or tightly in the tube B butwhich is adapted to reciprocate freely therein. This valve rod C projects at one end beyond the tube and the external bulb A and is provided with a suitable handle or flange c so that it can be conveniently adjusted or manipulated by hand. This `valve rod has a solid lower end forming the sliding valve C', and against this valve is secured the packingS by means of the screwVwhich passes through the packing and into the head C; and said valve rod is further provided with an annular groove in which is tted the packing j, said packings s, l7, forming tight joints between the valverod C', and the longitudinal tube B. This rod C is provided at points between the valve C and the packingj with a series of Aradial openings lo, adapted to align with the slots lr in the tube, and it also carries a guide pin tu, the ends of which project beyond the valve rod and ride in thelongitudinal slots r of the tube B so as to limit the valve rod to end wise movement in the tube B and thus prevent the valve rod from turning axially in the tube which would be liable to cause the valve rod to take such position that its openings 7c would not coincide with the slots r of the tube B.

E is the ordinary syringe (see Fig. 5) which is furnished with the usual com pressible bulb e, having check valves at its ends, the supply hose j", and the discharge hose g; and one end of this discharge hose is coupled in any suitable way to the outer free end of the hollow valve rod, C.

If desired, a packing n can be placed between the anged collar b of the fixed tube B and the end a. of the rigid bulb, see Fig. l.

Within the rigid bulb or receiver A, or between the latter and the fixed tube B, I provide the expansible and collapsible internal bulb G which is made of a piece of thin elastic rubber or other material suitable for the purposes of my invention. This elastic internal bulb G is madein such form that, whenit is expanded, it conforms to the shape of .and fills the Whole chamber of the rigid external bulb A, and when it is collapsed, it fits loosely around the internal tube. This elastic internal bulb is attached at its ends to the tube B in a very tight and secure manner, one end of said bulb being fastened to the tube at the point Z near where the collar b, is fixed in the end a of the bulb A and the other end of the bulb G is fastened to the tube at the point where it enters the nozzle a indicated by the letter Z. The elastic internal bulb is thus fastened to the tube B so that when the valve C is adjusted to close the openings the liquid forced through the tube enters and expands the bulb G to the full limit permitted by the external receiver A; but todischarge the liquid it is only necessary to adjust the valve rod and move `the valve C away from the openings whereby the pressure of the bulb G as itis contracted by the inherent elasticity of the rubber bulb,

and its openings 7c are in line with the slots r; the hose f is placed in a vessel of water or other liquid, the bulb e is operated and liquid forced into the internal bulb G until the latter is expanded to the full limit permitted by the bulb A. The nozzlect is inserted into the parts tobe washed or treated, the valve C withdrawn away from the openings a: in the tube B, and the pressure of the bulb G as it collapses forces the liquid through the tube B and the perforated head y. The liquid expelled into the part to be cleansed or treated Iills the space around the nozzlea and closes the openingsy, and as the bulb is collapsed around the tube, a vacuum is created in the bulb A, between the latter and the bulb G, so that a suction takes place to draw the liquid through the openings h into the bulb A. The syringe can be cleansed by adjusting the valve C to close the openings a; and forcing liquid into the bulb G which is expanded until it iills the bulb A and expels the liquid in the latter through the openings h.

I am aware that changes in the form and proportion of parts and details of construction of the devices herein shown and described as an embodiment of my invention can be made without departing from the spirit or sacrificing the advantages thereof, and I therefore reserve the right to make such changes and alterations therein as fairly fall within the scope of the same.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a syringe, the combination of a tube, an elastic bulb surrounding the tube'and connected therewith to receive from and discharge to the same, and a receiver surrounding the elastic bulb, but not communicating therewith, and having an opening in its nozzle through which fluid ejected from the tube may be drawn, by suction,into said receiver, for the purposes described, substantially as set forth.

2. In a syringe, substantially such as described, the combination of an external receiver provided with a perforated nozzle, a longitudinal perforated tube fixed withinl said receiver, an elastic internal bulb fastened to said tube in position to receive from some of the openings therein and to discharge the liquid through other openings i-n the tube, and a hollow valve rod and sliding valve operating within the tube, as and for thepurposes set forth.

3. The combination of a receiver provided with a perforated nozzle, a longitudinal tube fixed in the receiver and provided with the ingress and egress openings at intermediate IOO points of its length, a hollow valve rod oper-l ating in said tube and provided with egress openings and with a Valve adapted to close the egress openings of the tube, and an elastic bulb surrounding the tube and fastened thereto, substantially as and for the purposes described.

4. The combination of a receiver` A provided with a perforated nozzle a, the tube B- formed with the slots 1' andvopenings and having its perforated discharge end securedin the nozzlea, the hollow valve rod carrying. the guides which play in the slot-s of the tube and provided with the valve and the egress of the hollow valve rod coupled to the dis-V charge hose and provided with egress openingsand a piston head, the longitudinal perforated tube, a receiver, and an elastic bulb, substantially as described.

CHARLES D. HARSIN.

Witnesses:

AVERY C. WHITE, A. O.PARKER. 

